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Diffstat (limited to 'virt/kvm/arm/vgic/vgic-v3.c')
-rw-r--r--virt/kvm/arm/vgic/vgic-v3.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c
index 637ff2b85165..336a46115937 100644
--- a/virt/kvm/arm/vgic/vgic-v3.c
+++ b/virt/kvm/arm/vgic/vgic-v3.c
@@ -186,9 +186,30 @@ void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcrp)
vmcrp->pmr = (vmcr & ICH_VMCR_PMR_MASK) >> ICH_VMCR_PMR_SHIFT;
}
-/* not yet implemented */
void vgic_v3_enable(struct kvm_vcpu *vcpu)
{
+ struct vgic_v3_cpu_if *vgic_v3 = &vcpu->arch.vgic_cpu.vgic_v3;
+
+ /*
+ * By forcing VMCR to zero, the GIC will restore the binary
+ * points to their reset values. Anything else resets to zero
+ * anyway.
+ */
+ vgic_v3->vgic_vmcr = 0;
+ vgic_v3->vgic_elrsr = ~0;
+
+ /*
+ * If we are emulating a GICv3, we do it in an non-GICv2-compatible
+ * way, so we force SRE to 1 to demonstrate this to the guest.
+ * This goes with the spec allowing the value to be RAO/WI.
+ */
+ if (vcpu->kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3)
+ vgic_v3->vgic_sre = ICC_SRE_EL1_SRE;
+ else
+ vgic_v3->vgic_sre = 0;
+
+ /* Get the show on the road... */
+ vgic_v3->vgic_hcr = ICH_HCR_EN;
}
/* check for overlapping regions and for regions crossing the end of memory */